2161587 has 8 divisors (see below), whose sum is σ = 2892736. Its totient is φ = 1435752.

The previous prime is 2161571. The next prime is 2161591. The reversal of 2161587 is 7851612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2161587 - 2⁴ = 2161571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253 + ... + 2094.

It is an arithmetic number, because the mean of its divisors is an integer number (361592).

2^2161587 is an apocalyptic number.

2161587 is a deficient number, since it is larger than the sum of its proper divisors (731149).

2161587 is a wasteful number, since it uses less digits than its factorization.

2161587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657.

The product of its digits is 3360, while the sum is 30.

The square root of 2161587 is about 1470.2336548998. The cubic root of 2161587 is about 129.2977318726.

The spelling of 2161587 in words is "two million, one hundred sixty-one thousand, five hundred eighty-seven".